Re: [Q] Nexus 10 using 1gb+ RAM at all times?

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They just released the updated kernel source for 4.2.2 for the N10 and there is a change where they up the ram reserved for the GPU by 384mb. The comment says they did this as otherwise when the GPU needed more ram it would cause fragmentation of the user space ram.

Geoff

Sent from my Nexus 10 using Tapatalk HD

Sounds reasonable enough.

...uhm...

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Originally Posted by styckx

Sounds reasonable enough.

After having upgraded to 4.2.2... I have the same behaviour ....ram decreased to 1.3...in total before with 4.2.1 was 1.6...something strange, if the extra ram has been allocated for gpu....why with 4.2.1 wasn't like now?...in my opinion...they didn't free up the ram after upgrading..it's just locked...
I don't see notable differences between 4.2.2 and 4.2.1.... So that strange...could it be a bug?

Originally Posted by borgy

After having upgraded to 4.2.2... I have the same behaviour ....ram decreased to 1.3...in total before with 4.2.1 was 1.6...something strange, if the extra ram has been allocated for gpu....why with 4.2.1 wasn't like now?...in my opinion...they didn't free up the ram after upgrading..it's just locked...
I don't see notable differences between 4.2.2 and 4.2.1.... So that strange...could it be a bug?

The answer to why the total ram availible has decreased has been solved - Read gzub post.

Called it re-allocated, free'd up or locked, The GPU now has 800mb in 4.2.2 all to its self, where as before it had half that. So in running apps you will only see a total of around 1.2gb.

moving on...

I have a similar issue as the OP.

Sitting idle its running at around 400-500mb used but can, and often does, spike up to over a gb which causes it to not function correctly (Chrome especially seems to throw a massive wobbler and never stay open). I have nothing different installed than I have on my N7 or S3. I mainly use it for browsing, email. If I check running apps there is nothing else there above what was there when it was idling at around 400-500mb.

I have tried a factory reset and the issue still persists. Next step is to roll back to 4.2.1 to see if I can get the stability back as I didn't have these issues on 4.2.1.

Originally Posted by VanCatRabbit

The answer to why the total ram availible has decreased has been solved - Read gzub post.

Called it re-allocated, free'd up or locked, The GPU now has 800mb in 4.2.2 all to its self, where as before it had half that. So in running apps you will only see a total of around 1.2gb.

moving on...

I have a similar issue as the OP.

Sitting idle its running at around 400-500mb used but can, and often does, spike up to over a gb which causes it to not function correctly (Chrome especially seems to throw a massive wobbler and never stay open). I have nothing different installed than I have on my N7 or S3. I mainly use it for browsing, email. If I check running apps there is nothing else there above what was there when it was idling at around 400-500mb.

I have tried a factory reset and the issue still persists. Next step is to roll back to 4.2.1 to see if I can get the stability back as I didn't have these issues on 4.2.1.

Sounds you might be suffering from the same thing as I have since I got my N10.
I don't know how many have this or has noticed it but after a while the amount of free memory just starts disappearing and no matter what you do, you don't seem to be able to recover it unless you reboot. And when the memory gets low enough, the device soft reboots itself. I still haven't found the cause of this but I have finally found where all the memory is going. It turns out that it's the surfaceflinger process that hogs the memory. I started checking when I was running low on memory and surfaceflinger was at that point using over 400MB of it. My suspicion was confirmed when I rebooted and noticed that it went down to around 25MB and now after a while of usage, it has slowly climbed to 50MB.

It would be great if some developer could take a look at this in order to try to fix it.

Originally Posted by CazeW

Sounds you might be suffering from the same thing as I have since I got my N10.
I don't know how many have this or has noticed it but after a while the amount of free memory just starts disappearing and no matter what you do, you don't seem to be able to recover it unless you reboot. And when the memory gets low enough, the device soft reboots itself. I still haven't found the cause of this but I have finally found where all the memory is going. It turns out that it's the surfaceflinger process that hogs the memory. I started checking when I was running low on memory and surfaceflinger was at that point using over 400MB of it. My suspicion was confirmed when I rebooted and noticed that it went down to around 25MB and now after a while of usage, it has slowly climbed to 50MB.

It would be great if some developer could take a look at this in order to try to fix it.

Sorry for my ignorance, but what is surfaceflinger? I don't see anything similarly named on my device.

I've just downloaded 'usage timelines free' to monitor memory usage in more detail on all my devices and compare.

I'll try to update if I see anything interesting.

Originally Posted by VanCatRabbit

Sorry for my ignorance, but what is surfaceflinger? I don't see anything similarly named on my device.

I've just downloaded 'usage timelines free' to monitor memory usage in more detail on all my devices and compare.

I'll try to update if I see anything interesting.

It's a system process out of /system/bin/. Check your app to see if it's hiding system processes. Most of the process viewing apps/loggers hide system processes by default.

SurfaceFlinger is Androids compositor: http://stackoverflow.com/questions/5...surfaceflinger

SurfaceFlinger shouldn't stay open though. Everytime I've seen it in OS Monitor the process lasts less than a second and disappears. Something he's running, or the ROM he's using is keeping it open for whatever reason..

Originally Posted by styckx

It's a system process out of /system/bin/. Check your app to see if it's hiding system processes. Most of the process viewing apps/loggers hide system processes by default.

SurfaceFlinger is Androids compositor: http://stackoverflow.com/questions/5...surfaceflinger

SurfaceFlinger shouldn't stay open though. Everytime I've seen it in OS Monitor the process lasts less than a second and disappears. Something he's running, or the ROM he's using is keeping it open for whatever reason..

I noticed it with the "ps" terminal command. Currently I'm running Aokp but before that I was running stock. I'm suspecting the aosp browser or flash being the cause but I can't confirm it.

EDIT: surfaceflinger is shown in OS Monitor all the time but with ps I can see the amount of memory it is using.

After some monitoring I found nothing. I did a full refresh install of 4.2.2 from the factory image and have installed nothing on top other than applying updates for what comes as standard. After two days of browsing it started to slow down again and show as low memory. I installed a terminal and ran 'PS surfaceflinger', it was showing as using over 600mbs. Stupidly I didn't take a screen dump, but I imagine it will happen again.

Anyone able to shed any light on what's going on here?

Having the same issue

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I too have seen surfaceflinger using almost 600MB of RAM. My used RAM was over 1GB and apps were running very sluggish. My SwiftKey keyboard constantly does a soft restart in the middle of typing when the tablet is in this state as well as other apps acting as others have described in this thread. Time for a fix Google!